FRIGN wrote: > Refer to this: > https://wiki.archlinux.org/index.php/xorg#Display_size_and_DPI
Not mentioned there, but working with any screen that communicates it's
physical size correctly:
xrandr --fbmm $(xrandr | /bin/sed -n '/ connected / {s/.* \([0-9]\+\)mm
x \([0-9]\+\)mm/\1x\2/p;q}')
